In a sharp reversal of the Obama administration’s policy on trying Sept. 11 suspects in U.S. courts, mastermind Khalid Sheikh Mohammed and four co-conspirators will be tried in a military commission at Guantanamo Bay.

Attorney General Eric Holder today placed the blame squarely on Congress for creating conditions where the Department of Justice cannot try them in a federal court, saying their decision would gravely impact U.S. national security and counterterrorism efforts.

Security Debrief is a blog dedicated to homeland security, terrorism and counter-terrorism, intelligence and law enforcement that provides context to the debates, policies and politics that are playing out in Washington, D.C.